<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        let cartGoods = [
    {
        goodsname:'小米10',
        price:5000,
        isChecked:true,//代表是否选中了
    },
    {
        goodsname:'苹果10',
        price:3000,
        isChecked:false,//代表是否选中了
    }
]
let allChecked =  cartGoods.every(function(item){
    return item.isChecked
})
if(allChecked){
 console.log('此时是全选状态');
}else{
console.log('此时不是全选状态');
}
</script>
</body>
</html>